package socket;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

/**
 *
 */
public class Server4 {
    private ServerSocket serverSocket;
    private List<PrintWriter>allOut = new ArrayList<>();
    public Server4() {
        try{
            System.out.println("正在启动服务器");
            serverSocket = new ServerSocket(8088);
            System.out.println("服务器启动完毕");
        }catch( IOException e){
            e.printStackTrace();
        }
    }
    public void start(){
        try{
            while (true){
                System.out.println("等待客户端链接");
                Socket socket = serverSocket.accept();
                System.out.println("一个客户端连接上了!");
                ClientHandler handler = new ClientHandler(socket);
                Thread t = new Thread(handler);
                t.start();
            }
        }catch(IOException e){
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Server4 server = new Server4();
        server.start();
    }

    /**
     *
     */
    private class ClientHandler implements Runnable{
        private Socket socket;
        private String host;//记录该客户端的IP地址
        public ClientHandler (Socket socket){
            this.socket = socket;
            //通过socket获取远端计算机IP地址的字符串格式
            host = socket.getInetAddress().getHostAddress();
        }
        public void run(){
            try {
                InputStream in = socket.getInputStream();
                InputStreamReader isr = new InputStreamReader(in, StandardCharsets.UTF_8);
                BufferedReader br = new BufferedReader(isr);

                OutputStream out = socket.getOutputStream();
                OutputStreamWriter osw = new OutputStreamWriter(out,StandardCharsets.UTF_8);
                BufferedWriter bw = new BufferedWriter(osw);
                PrintWriter pw = new PrintWriter(bw,true);
                allOut.add(pw);

                String message;
                while ((message = br.readLine())!=null){
                    System.out.println(host+"说:"+message);
                    pw.println(host+"说:"+message);
                    for (PrintWriter o: allOut){
                        o.println(host+":说:"+message);
                    }
                }
            } catch ( IOException e ) {
                e.printStackTrace();
            }
        }
    }
}
